Cable management rack for telecommunication cross-connect systems

ABSTRACT

The present disclosure relates to a rack for telecommunications equipment. The rack includes a frame defining a bay opening sized and shaped for receiving a plurality of jack modules. The rack also includes a first set of cable management brackets that define a first vertical channel arranged and configured for receiving and vertically managing a plurality of cross-connect cables. Each of the cable management brackets includes a pivot portion that is pivotally movable relative to the frame. The pivot portions are pivotally movable between first positions in which the pivot portions extend partially across a front of the bay opening, and second positions in which the pivot portions are generally offset from the front of the bay opening. The present disclosure also relates to a rack for telecommunications equipment that includes rear cable management structure that defines a plurality of vertical channels along a back side of the rack. The present disclosure further relates to a telecommunications jack module including an array of jacks arranged in top and bottom horizontal rows. The jack module also includes an array of cross-connect locations positioned beneath the bottom horizontal row of jacks. The array of cross-connect locations is electrically connected to both the top and bottom rows of jacks.

FIELD OF THE INVENTION

The present invention relates generally to the field oftelecommunication equipment. More particularly, the present inventionrelates to high density frames, bays or racks for holding jack modulesused to provide cross-connections between telecommunication circuits.

BACKGROUND OF THE INVENTION

A digital cross-connect system (DSX) provides a location forinterconnecting two digital transmission paths. The apparatus for a DSXis located in one or more frames, racks or bays, usually in a telephonecentral office. The DSX apparatus also provides jack access to thetransmissions paths. DSX jacks are well known and commonly include aplurality of bores or ports sized for receiving tip-and-ring plugs. Inthe case of tip-and-ring plugs, a plurality of spring contacts areprovided within the ports for contacting the tip-and-ring plugs. Thejacks are typically electrically connected to digital transmissionlines, and are also electrically connected to a plurality of wiretermination members used to cross-connect the jacks. By inserting plugswithin the ports of the jacks, signals transmitted through the jacks canbe interrupted or monitored.

The number of jacks or cross-connect points that are located at a bay ofa given size is referred to as the density of the bay. As thecross-connect density increases, the management of telecommunicationwires or cables in the bay becomes increasingly complex. For highdensity DSX bays, wire management is critical. Ease of access toindividual jacks or jack modules is also important.

SUMMARY OF THE INVENTION

One aspect of the present invention relates to a rack fortelecommunications equipment. The rack includes a frame defining a bayopening sized and shaped for receiving a plurality of jack modules. Therack also includes a first set of cable management brackets that definea first vertical channel arranged and configured for receiving andvertically managing a plurality of cross-connect cables. Each of thecable management brackets includes a pivot portion that is pivotallymovable relative to the frame. The pivot portions are pivotally movablebetween first positions in which the pivot portions extend partiallyacross a front of the bay opening, and second positions in which thepivot portions are generally offset from the front of the bay opening.To insert aback module into the bay opening or to remove aback modulefrom the bay opening, the pivot portions are pivoted to the secondpositions thereby allowing the jack module to be moved in or out of thebay opening without encountering interference from the cable managementbrackets. In this manner, jack modules can be inserted into the bayopening or removed from the bay opening without requiring the cablemanagement brackets to be disconnected from the frame.

Another aspect of the present invention relates to a cable managementbracket. The cable management bracket includes a first bracket portionhaving a main base and spaced-apart, substantially parallel upper andlower bracket members that extend transversely outward from the mainbase. The first bracket portion also includes retaining tabs thatproject transversely outward from free ends of the upper and lowerbracket members. The cable management bracket also includes a secondbracket portion including a pivot base and an intermediate bracketmember that extends transversely outward from the pivot base. Theintermediate bracket member is vertically aligned generally between theupper and lower bracket members of the first bracket portion. The secondbracket portion also includes a retaining tab that projects transverselyoutward from the intermediate bracket member. The pivot base of thesecond bracket portion is pivotally connected to the main base of thefirst bracket portion such that the first and second bracket portionsare pivotally movable relative to one another. For example, the firstand second bracket portions can be pivoted between a first position inwhich the first and second bracket portions define a generallyrectangular opening sized for receiving a plurality of cross-connectcables, and a second position in which the intermediate bracket memberof the second bracket portion extends between the upper and lowerbracket members of the first bracket portion.

A further aspect of the present invention relates to a jack module for atelecommunications system. The jack module includes an array of jacksforming a front face defining a plurality of ports for receivingtip-and-ring plugs. The array of jacks includes a first horizontal rowof jacks and a second horizontal row of jacks. The first horizontal rowof jacks is positioned above the second horizontal row of jacks. Thejack module also includes an array of cross-connect locations positionedbeneath the second horizontal row of jacks. The array of cross-connectlocations includes first sets of cross-connect locations that areelectrically connected to corresponding ones of the first row of jacks.The array of cross-connect locations also includes second sets ofcross-connect locations that are electrically connected to correspondingones of the second row of jacks.

Still another aspect of the present invention relates to a rack fortelecommunications equipment. The rack includes a frame defining a bayopening sized and shaped for receiving a plurality of jack modulesthrough a front side of the frame. The rack also includes a rear cablemanagement structure mounted at a back side of the frame. The rear cablemanagement structure includes a rear panel defining at least one accessopening sized and positioned for providing access to input/outputconnection locations corresponding to at least one of the jack moduleswhen the jack module is mounted in the bay opening of the frame. Therear cable management structure also includes rear channel definingmembers secured to the rear panel. The rear channel defining membersdefine a plurality of rear cable management channels sized and shapedfor providing vertical cable management for input/output cables thatextend along the back side of the frame. By running input/output cablesalong the back side of the frame, fillers between adjacent frames can beeliminated. Also, besides managing the input/output cables located atthe back side of the frame, the rear channel defining members can alsobe used to segregate input/output cables from power and ground wirescorresponding to jack modules mounted on the rack.

A variety of advantages of the invention will be set forth in part inthe description that follows, and in part will be apparent from thedescription, or may be learned by practicing the invention. It is to beunderstood that both the foregoing general description and the followingdetailed description are exemplary and explanatory only and are notrestrictive of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute apart of this specification, illustrate several aspects of the inventionand together with the description, serve to explain the principles ofthe invention. A brief description of the drawings is as follows:

FIG. 1 is perspective view of two interconnected racks constructed inaccordance with the principles of the present invention;

FIG. 2 is a front, elevational view of the two interconnected racks ofFIG. 1;

FIG. 3 is a schematic illustration showing the cross-connect systembeing used to cross-connect two pieces of telecommunications equipment;

FIG. 4 is a front perspective view of a jack module constructed inaccordance with the principles of the present invention;

FIG. 5 is a front elevational view of the jack module of FIG. 4;

FIG. 6 is a rear perspective view of the jack module of FIG. 4;

FIG. 7 is a rear elevational view of the jack module of FIG. 4;

FIG. 8 is an illustrative circuit diagram for one of the jacks of thejack module of FIG. 4;

FIG. 9A is a perspective view of a front cable management bracket usedby the rack of FIGS. 1 and 2, the bracket is shown in an openorientation;

FIG. 9B is a perspective view of the bracket of FIG. 8A in a closedorientation;

FIG. 10 is a perspective view of a rear cable management structureconstructed in accordance with the principles of the present invention;

FIG. 11 is an elevational view of the rear cable management structure ofFIG. 10;

FIG. 12 is a perspective view of a further rear cable managementstructure constructed in accordance with the principles of the presentinvention; and

FIG. 13 is an elevational view of the rear cable management structure ofFIG. 12.

DETAILED DESCRIPTION

I. General Description

Reference will now be made in detail to exemplary aspects of the presentinvention that are illustrated in the accompanying drawings. Whereverpossible, the same reference numbers will be used throughout thedrawings to refer to the same or like parts.

FIGS. 1 and 2 show two interconnected racks 20 constructed in accordancewith the principles of the present invention. The racks 20 areconfigured to form a front cross-connect system 18. Each of the racks 20includes a frame 21 that defines a generally rectangular bay opening 22sized and shaped for receiving a plurality ofjack modules 24. The jackmodules 24 of the system each include a chassis 120 housing a front jackfield 26, a front cross-connect field 46 (shown in FIGS. 4 and 5), and arear equipment or input/output field 58 (shown in FIGS. 6 and 7). Forclarity, the left rack 20 is shown fully loaded with the jack modules24, while the right rack 20 is empty such that the bay opening 22 ismore clearly visible.

The front cross-connect system 18 is used to provide cross-connectionsbetween pieces of telecommunications equipment. For example, FIG. 3schematically shows first and second pieces of telecommunicationsequipment 23 and 25 that are cross-connected by the front cross-connectsystem 18. As shown in FIG. 3, a twisted pair signal 43 from the firstpiece of equipment 23 is inputted at a back side 15 of the system 18,cross-connected across a front side 17 of the system 18, and thenoutputted from the back side 15 of the system 18 to the second piece ofequipment 25. Similarly, a twisted pair signal 45 from the second pieceof equipment 25 is inputted at the back side 15 of the system 18,cross-connected across the front side 17 of the system 18, and thenoutputted from the back side 15 of the system 18 to the first piece ofequipment 23. The cross-connect fields 46 provide access locations forcross-connecting the signals 43 and 45. The input/output fields 58provide access locations for inputting and outputting the signals 43 and45. As will be described later in the specification, the jack fields 26(shown in FIGS. 1 and 2) provide access for interrupting, monitoring andbypassing the signals 43 and 45. As will also be described later in thespecification, the racks 20 are provided with various vertical andhorizontal cable management structures for managing the cables connectedto the cross-connect fields 46 and the input/output fields 58.

II. Chassis

The chassis 120 of the jack modules 24 provide two primary functions.First, the chassis 120 are configured to house or support the jackfields 26, the cross-connect fields 46, and the input/output fields 58.The chassis 120 are also configured to independently secure the jackmodules 24 to the frames 21.

Referring to FIG. 4, a representative one of the jack modules 24 and itscorresponding chassis 120 are shown. The chassis 120 includes a topcover 122 positioned opposite from a bottom cover 124. Oppositelypositioned main side walls 126 are fastened between the top and bottomcovers 122 and 124. Central extensions 128 (only the top one of which isshown) project outward in a forward direction from the top and bottomcovers 122 and 124. Generally rectangular notches 130 are located onopposite sides of the central extensions 128. Oppositely positionedsecondary side walls 132 (only one of which is shown) are fastenedbetween central extensions 128. The central extensions 128 and thesecondary side walls 132 cooperate to form a housing for receiving oneof the jack fields 26.

As indicated above, the chassis 120 are adapted for connection to theframes 21. For example, referring to FIG. 4, the illustrated chassis 120includes a plurality of mounting flanges 134 positioned at a front sideof the jack module 24. The mounting flanges 134 project transverselyoutward from the main side walls 126 and define apertures for allowingthe chassis 120 to be fastened to one of the racks 20 by conventionalfasteners (e.g., bolts, screws or the like).

To mount the jack modules 24 within the frames 21, the chassis 120 areinserted into the bay openings 22 through front sides 28 of the frames21. Once the chassis 120 are positioned within the bay openings 22, themounting flanges 134 of the chassis 120 are fastened to the frames 21.To remove the jack modules 24 from the frames 28, the mounting flanges134 are unfastened, and the chassis 120 are pulled back through thefront sides 28 of the frames 21.

III. Jack Field

As shown in FIGS. 1 and 2, the front jack fields 26 of the jack modules24 face outward from the front sides 28 of the frames 21. Each jackfield 26 includes an array of separate circuits or jacks 30 (e.g.,eighty-four jacks 30 are shown in each of the jack fields 26). Referringto FIG. 5, the illustrated jack field 26 is arranged in an array ofjacks 30 having a top, horizontal row 32 positioned above a bottom,horizontal row 34. The array is generally rectangular and has ahorizontal width W₁. In the preferred embodiment, each of the jacks 30includes a LED port 38, a MONITOR port 40, an OUT port 42, and an INport 44. More or fewer ports than those could be used. For example, andextra MONITOR port (e.g., for monitoring an “IN” signal) could be used.

Referring to FIG. 4, the jacks 30 of the illustrated jack field 26 arefastened (e.g., by fasteners 33) to a front jack panel 136. The jackpanel 136 is connected to the chassis 120. For example, the jacks 30 aresecured generally between the central extensions 128 of the chassis 120,and fasteners 35 are used to connect the jack panel 136 to the secondaryside walls 132 of the chassis 120. As so mounted, the jacks 30 arearranged and configured to form a generally planar front face of thejack module 24. By disconnecting the fasteners 35 from the secondaryside walls 132, the entire jack field 26 can be independently removedfrom the jack module 24.

IV. Cross-Connect Field

Referring to FIGS. 1, 2,4 and 5, similar to the jack fields 26, thecross-connect fields 46 of the jack modules 24 face outward from thefront sides 28 of the frames 21. Each of the cross-connect fields 46 ispositioned directly beneath a corresponding one the jack fields 26 andhas a horizontal width W₂ that is greater than the horizontal width W₁of the jack fields 26. The cross-connect fields 46 each include aplurality of sets (e.g., 84 sets are shown) of cross-connect locations(e.g., wire termination members, pins, electrical connectors or thelike). For example, as shown in FIG. 5 each set of cross-connectlocations include a tracer lamp contact 48, a cross-connect tip-outcontact 50, a cross-connect ring-out contact 52, a cross-connect tip-incontact 54 and a cross-connect ring-in contact 56. As will be describedlater in the specification, each set of cross-connect contacts iselectrically connected to a corresponding jack 30 within the same jackmodule.

Referring to FIGS. 4 and 5 (in which the frame 21 has been omitted forclarity), the cross-connect field 46 of the illustrated module 24 issecured to the chassis 120 by a cross-connect panel 140. Thecross-connect panel 140 is recessed relative to the front face of thejack field 26 and is fastened to the chassis 120 by fasteners 141. Sideportions 142 of the cross-connect panel 140 are located adjacent thenotched regions 130 of the chassis 120 on opposite sides of the jackfield 26. A lower portion 144 of the cross-connect panel 140 extendsbeneath the jack field 26 and interconnects the two side portions 142.The cross-connect field 46 is secured to the lower portion 144 of thecross-connect panel 140. By disconnecting the fasteners 141, the entirecross-connect panel 140, including the cross-connect field 46, can beindependently removed from the chassis 120.

To facilitate horizontal cable management, the lower portion 144 of thecross-connect panel 140 includes a generally horizontal jumper tray 146located beneath the cross-connect field 46. The jumper tray 146 projectsin a forward direction from the chassis 120 and is adapted forsupporting cross-connect cables connected to the cross-connect field 46.Because the cross-connect panel 140 is recessed inward relative to thefront of the chassis 120, the jumper tray 146 can project outwardwithout violating the bay footprint. A jumper tray door 148 is pivotallyconnected to a free end of the jumper tray 146. The jumper tray door 148is pivotally movable about a generally horizontal pivot axis.

V. Input/Output Field

Referring to FIG. 6 and 7, a representative one of the input/outputfields 58 is shown. The illustrated input/output field 58 faces outwardfrom a back side of the chassis 120 and includes three separate arraysof input/output connection locations. Each array includes a plurality ofsets ( e.g., 28 sets) of input/output locations. As shown in FIG. 6,each set includes a tip-out contact 60, a ring-out contact 62 a tip-incontact 64, and a ring-in contact 66. The input/output contact locationspreferably comprise wire termination members, pins, electricalconnectors, or the like. Each set of input/output connection locationsis preferably electrically connected to a corresponding jack mountedwithin the same module 24.

Referring again to FIG. 7, the jack module 24 also includes a voltagecontact 68, a voltage return contact 70, and shield ground contact 72,and a chassis ground contact 74. Similar to the input/output field 58,the contacts 68, 70, 72 and 74 face outward from the back side of thechassis 120.

VI. Jack Circuitry

FIG. 8 is a circuit diagram illustrating the electrical connections madefor one of the jacks 30. The illustrated jack 30 is shown receiving atwisted pair signal 43′ from a first piece of telecommunicationsequipment 23′. The jack 30 is also shown outputting a cross-connectedtwisted pair signal 45′ (e.g., a signal cross-connected from a secondpiece of equipment) to the first piece of equipment 23′. It will beappreciated that similar electrical configurations are used for each ofthe jacks 30 in each module 24.

Referring to FIG. 8, the IN port 44 includes a ring spring 76, and anormal spring 78 that normally engages the ring spring 76. The IN portalso includes a tip spring 80 and a normal spring 82 that normallyengages the tip spring 80. The ring spring 76 is electrically connectedto ring-in contact 66. The normal contact 78 is electrically connectedto cross-connect ring-in contact 56. The tip spring 80 is electricallyconnected to tip-in contact 64. Finally, the normal contact 82 iselectrically connected to cross-connect tip-in contact 54.

The signal 45′ enters the jack 30 through the cross-connect contacts 54and 56. With no plug inserted within the IN port 44, the signal 45′passes from the normal springs 82 and 78 though the tip-and-ring springs80 and 76 and is outputted through contacts 64 and 66 to the first pieceof equipment 23′. By inserting a plug 90 within the IN port 44, thesignal 45′ can be interrupted and a signal from the inserted plug 90 canbe outputted at contact points 64 and 66. With respect to the jack 30,the signal 45′ is commonly referred to as an “IN” signal because it isinputted to the first piece of equipment 23′.

Referring again to FIG. 8, the OUT port 42 includes a ring spring 92 anda normal spring 94 that normally contacts the ring spring 92. The OUTport 42 also includes a tip spring 96, and normal spring 98 thatnormally contacts tip spring 96. The ring spring 92 is electricallyconnected to ring-out contact 62, and the normal contact 94 iselectrically connected to cross-connect ring-out contact 52. The tipspring 96 is electrically connected to tip-out contact 60, and thenormal spring 98 is electrically connected to cross-connect tip-outcontact 50. A signal 43′ is transmitted from the first piece ofequipment 23′ to the jack 30 through contacts 60 and 62. With no plug inthe OUT port 42, the signal 43′ travels from the tip-in ring springs 96and 92 through the normal springs 98 and 94 and exits the jack 30 viacross-connect contacts 50 and 52. Frequently, the cross-connect contacts50 and 52 are electrically connected to another set of cross-connectcontacts to provide a cross-connection. By inserting a plug within theOUT port 42, the signal 43′ from contacts 60 and 62 is interrupted andmay be outputted to the tip-and-ring contacts of the plug insertedwithin the OUT port 42. With respect to the jack 30, the signal 43′ iscommonly referred to as an “OUT” signal because it is outputted from thefirst piece of equipment 23′.

Still referring to FIG. 8, the MONITOR port 40 includes a ring spring100 electrically connected to the ring spring 92 of the OUT-port 42, anda tip spring 102 electrically connected to the tip spring 96 of the OUTport 42. Frequently it is desirable to monitor the signal 43′ arrivingthrough contacts 62 and 60 without interrupting the signal 43′. Toaccomplish this, a plug is inserted into the monitor port 40. On thisoccurrence, the plug taps into the signal 43′ being transmitted throughthe tip-and-ring springs 96 and 92 of the OUT port 42 withoutinterrupting the signal 43′. Resistors prevent the signal 43′ from shortcircuiting through the tip and ring springs 102 and 100.

The MONITOR port 40 also includes a spring 104 that is mechanicallyconnected to the ring spring 100 by a dielectric spacer 106. The spring104 is electrically connected to tracer lamp contact 48. Additionally, alead 108 electrically connects the spring 104 to an LED 1 10 preferablymounted at the LED port 3 8. The LED 110 is also electrically connectedto voltage contact 68. A return spring 112 is positioned above thespring 104. The return spring 112 is electrically connected to voltagereturn contact 70. When a plug is inserted within the monitor port 40,the spring 104 is biased into contact with the return spring 112. Thiselectrical connection connects the LED 110 to the return line 112thereby illuminating the LED. An integrated circuit chip 114 controlsthe flashing of the LED 110 as is conventionally known in the art. Inaddition to activating the LED, insertion of a plug into the monitorport 40 also grounds the tracer lamp contact 48 causing illumination ofan LED on a jack to which the present jack is cross-connected.

VII. Front Cable Management

As shown in FIGS. 1 and 2, each rack 20 includes two sets of cablemanagement brackets 150 that define vertical channels 152 arranged forreceiving and vertically managing a plurality of cross-connect cables.For example, the channels 152 are configured to manage verticalcross-connect cables, such as cable 154, that extend between differentjacks in the same rack 20. Also, the vertical channels 154 verticallymanage cross-connect cables, such as cable 156, that extend from one ofthe jacks 30 to either a top or bottom trough 158. The troughs 158provide horizontal support for cross-connect cables interconnectedbetween two different racks 20. As shown in FIG. 2, outer edges or lips159 of the troughs 158 are aligned generally along vertical planes Pthat extend along innermost portions of the brackets -150. The alignmentof the lips 159 along the planes P assists in providing smooth cabletransitions between the troughs 158 and the channels 152.

The vertical channels 152 are located on opposite sides of each frame 21with the jack modules 24 located between the channels 152. The cablemanagement brackets 150 include outer bracket portions 160 fixedlyconnected to the fronts 28 of the frames 21 by fasteners 162. The cablemanagement brackets 150 also include inner bracket portions 164pivotally connected to the outer bracket portions 160. The inner bracketportions 164 of the brackets 150 are pivotally movable aboutsubstantially vertical pivot axes between a first orientation (shown inFIGS. 1, 2 and 9A) and a second orientation (shown in FIG. 9B). When inthe first orientation, the inner bracket portions 164 extend partiallyacross (e.g., partially block or obstruct) front regions of the bayopenings 22. When in the second orientation, the inner bracket portions164 are generally offset from the front regions of the bay openings 22.

The pivotal nature of the brackets 150 assists in installing or removingthe jack modules 24 from the frames 21. For example, to install one ofthe jack modules 24 in one of the frames 21, the jack module 24 isinserted through the front 28 of the frame 21 into the bay opening 22.Once the module 24 is positioned within the bay 22, the chassis 120 ofthe jack module 24 is fastened to the frame 21. If the brackets 150 werenot free to pivot, the inner bracket portions 164 that overlap thefronts of the bay openings 22 would prevent the modules 24 from beinginserted in or removed from the frames 21. However, because the innerbracket portions 164 are free to pivot, the jack modules 24 can beinserted into or removed from the frames 21 without removing thebrackets 150 from the frames 21. For example, by pivoting the innerbracket portions 164 from the first position of FIGS. 1, 2 and 9A to thesecond position of FIG. 9B, sufficient clearance is provided forallowing the jack module 24 to be inserted into or removed from eachframe 21. Because the brackets 150 are connected to the frames 21, fullvertical cable management is provided at the front of the rack 20 evenif only a few modules 24 are mounted in a given frame 21.

Referring to FIGS. 9A and 9B, the outer bracket portion 160 of eachbracket 150 includes a main base 166 and spaced-apart, substantialparallel upper and lower bracket members 168 and 170 that extendtransversely outwardly from the main base 166. The first bracket portionalso includes retaining tabs 172 that project transversely outward fromfree ends of the upper and lower bracket members 168 and 170.

The inner bracket portion 164 of each mounting bracket 150 includes apivot base 174 and an intermediate bracket member 176. The intermediatebracket member 176 of each pivot base 174 is vertically alignedgenerally between the upper and lower bracket members 168 and 170 of itscorresponding outer bracket portion 160. Each inner bracket portion 164also includes a transversely projecting retaining tab 178.

The pivot bases 174 are pivotally connected to the main bases 176 suchthat the inner and outer bracket portions 164 and 160 are pivotallymovable relative to one another. Each bracket 150 defines a generallyrectangular opening sized for receiving a plurality of cross-connectedcables when in the first or open position of FIG. 9A. When the brackets150 are in the second or closed position of FIG. 9B, the intermediatebracket members 176 fit between the upper and lower bracket members 168and 170.

VIII. Rear Cable Management

The racks 20 are configured such that input/output cables (e.g.,equipment cables), which commonly extend downward from a ceiling accesslocation or upward from a floor access location, are adapted to extendalong back sides 29 of the frames 21. Consequently, unlike someconventional designs, the input/output cables are not fed between theindividual racks 20 and no fillers are required.

The racks 20 include rear cable management structures for verticallymanaging the cascade of input/output cables that will be provided thatthe back side 29 of each frame 21. For example, referring to FIGS. 6 and7, the racks 20 include a plurality of rear cable management panels 180(one of which is shown) adapted to be connected to the back side 29 ofeach frame 21. The illustrated cable management panel 180 includestransverse flanges 181 defining openings for allowing the rear cablemanagement panel 180 to be fastened (e.g., by fasteners such as bolts,screws or the like) to the back side 29 of one of the frames 21. Forclarity, the frame 21 has been omitted from FIGS. 6 and 7 to bettershown the spacial relationship between the panel 180 and itscorresponding chassis 120 when both are secured to the frame 1.

As shown in FIGS. 6 and 7, the illustrated rear cable managementstructure also includes three sets of tie-down members 182 that arelaterally spaced across the rear cable management panel 180 so as todefine a plurality of vertical channels 184. Each set of tie-downmembers 182 includes two vertically spaced-apart tie-down members 182that project outward from the rear cable management panel 180. Thetie-down members 182 define a plurality of openings 186 for allowinginput and output cables to be tied down.

The rear cable management panel 180 of FIGS. 6 and 7 defines threeseparate access openings 188 sized for receiving the three separatearrays of input/output connection locations corresponding to the jackmodule 24. Cable bars 190 are positioned adjacent the access openings188. The cable bars 190 define vertically elongated tie-down loops fortying down cables. The cable bars 190 are preferably positioned betweenthe access openings 188 and their corresponding sets of tie down members182.

Referring to FIG. 7, several input/output cables 192 are shown extendingalong the rear cable management panel 180. The cables 192 have firstportions 194 tied down at the tie-down members 182, and second portions196 tied down at the cable bars 190. In this manner the cables 192extend laterally from their corresponding tie-down members 182 to theircorresponding input/output connection location.

Still referring to FIG. 7, the rear cable management panel 180 alsodefines an opening 191 for providing access to the voltage contact 68,the voltage return contact 70, the shield ground contact 72 and thechassis ground contact 74. The contacts 68-74 are separated from theinput/output cables 192 by the tie-down members 182. A lance 198 isprovided for tying down wires connected to the contacts 68-74.

FIGS. 10 and 11 illustrate an alternative rear cable managementstructure constructed in accordance with the principles of the presentinvention. The structure includes a rear cable management panel 280. Thepanel 280 includes transverse flanges 281 defining apertures forallowing the panel 280 to be connected to the back side 29 of one of theframes 21 by conventional fasteners. The cable management structure alsoincludes three separate vertical channels 284 for vertically managinginput/output cables. Each of the vertical channels 284 is defined by twovertically-spaced apart bracket members 282. The bracket members projectoutward from the cable management panel 280 and define generallyrectangular openings sized for receiving the input/output cables.Generally rectangular access openings 288 are positioned adjacent toeach of the vertical channels 284. The access openings 288 are sized andshaped to provide access to input/output contact locations correspondingto a particular jack module. The cable management panel 280 also definesan opening 291 for providing access to voltage contacts, voltage returncontacts, shield ground contacts and chassis ground contactscorresponding to the particular jack module.

FIGS. 12 and 13 show another rear cable management structure constructedin accordance with the principles of the present invention. The cablemanagement structure includes a rear cable management panel 380. Therear cable management panel 380 includes transverse flanges 381 definingopenings for allowing the panel 380 to be fastened (e.g., byconventional fasteners) to the back side 29 of one of the frames 21. Thecable management panel 380 defines a single, central access opening 388for providing input/output contact access. The rear cable managementstructure also includes six vertical cable management channels 384defined between eight sets of tie-down members 382. Each set of tie-downmembers 382 includes three vertically spaced-apart tie-down members 382.

Having described preferred aspects and embodiments of the presentinvention, modifications and equivalents of the disclosed concepts mayreadily occur to one skilled in the art. However, it is intended thatsuch modifications and equivalents be included within the scope of theclaims that are appended hereto.

1-19. (canceled)
 20. A cable management bracket comprising: a firstbracket portion including a main base and spaced-apart, substantiallyparallel upper and lower bracket members that extend transverselyoutward from the main base, the first bracket portion also includingretaining tabs that project transversely outward from free ends of theupper and lower bracket members; a second bracket portion including apivot base and an intermediate bracket member that extends transverselyoutward from the pivot base and is vertically aligned generally betweenthe upper and lower bracket members, the second bracket portion alsoincluding a retaining tab that projects transversely outward from theintermediate bracket member; the pivot base being pivotally connected tothe main base such that the first and second bracket portions arepivotally moveable relative one another; and the first bracket portionand the second bracket portion being pivotally moveable between a firstposition in which the first and second bracket portions define agenerally rectangular opening sized for receiving a plurality ofcross-connect cables, and a second position in which the intermediatebracket member of the second bracket portion extends between the upperand lower bracket members of the first bracket portion.
 21. A jackmodule for a telecommunications system, the jack module comprising: anarray of jacks forming a front face defining a plurality of ports forreceiving tip-and-ring plugs, the array of jacks including a firsthorizontal row of jacks and a second horizontal row of jacks, the firsthorizontal row of jacks being positioned above the second horizontal rowof jacks; and an array of cross-connect locations positioned beneath thesecond horizontal row of jacks, the array of cross-connect locationsincluding first sets of cross-connect locations that are electricallyconnected to corresponding ones of the first row of jacks, and the arrayof cross-connect locations also including second sets of cross-connectlocations that are electrically connected to corresponding ones of thesecond row of jacks.
 22. The jack module of claim 21, further comprisinga jumper tray positioned directly below the array of cross-connectlocations.
 23. The jack module of claim 22, wherein the jumper trayincludes a front door that pivots about a generally horizontal pivotaxis.
 24. The jack module of claim 21, further comprising front coverpanel portions positioned on opposite sides of the array of jacks, thefront cover panel portions being generally parallel to the front faceformed by the array of jacks, the front cover panel portions also beingrecessed relative to the front face formed by the array of jacks, andthe front cover panel portions being interconnected by an intermediatepanel portion on which the array of cross-connect locations is mounted.25. The jack module of claim 21, wherein the array of jacks is generallyrectangular and has a horizontal width W₁, and the array ofcross-connect locations is generally rectangular and has a horizontalwidth W₂ that is greater than the width W₁.
 26. The jack module of claim10, wherein the array of jacks and the array of cross-connect locationsare secured to a chassis adapted to be connected to a telecommunicationsrack. 27-34. (canceled)